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1987 Fiscal Year Final Research Report Summary

Development of Method Evaluating Damaged places and Levels in Concrete Structures Through AE Monitoring

Research Project

Project/Area Number 61850084
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 土木構造
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SATAKE Masao  Tohoku Niversity, Professor, 工学部, 教授 (50005188)

Co-Investigator(Kenkyū-buntansha) YAMANOUCHI Masaji  Fukushima National Coollege of Technology, Associate Professor, 助教授 (80132570)
NIISEKI Shigeru  Tohoku University,Research Associate, 工学部, 助手 (30005524)
TANO Hisataka  Nihon University, Associate Professor, 工学部, 助教授 (00059700)
KISHINO Yuji  Tohoku University, Associate Professor, 工学部, 助教授 (00005448)
Project Period (FY) 1986 – 1987
Keywordsacoustic emission / concrete / fracturing level / deterioration / sea water / alkali-aggregate reaction / Kaiser effect / source location / wave form analysis / 凍結融解
Research Abstract

The evaluation of hereditary stress through the kaiser effect was researched and the following results were clarified.
(1) The accuracy in evaluating the hereditary stress depends on the loading velocity of hereditary stress at each loading level which is determined on the basis of the ultimate strength of concrete specimens, but except for the almost fractured state, the influence of loading velocity on the accuracy in evaluating it is small and the mean error is ablut 4percent.
(2) The influence of mix proportion on the accuracy in evaluating the hereditary stress is small.
(3) The compressive and tensile stresses in alternately loaded plain concrete beams which are 15cm high, 15cm wide and 53cm long are evaluated through the cores cut out of them, and their errors are about 18 percent and 9.5 percent in average reespectively.
Defining the parameter m which expressed the increasing rate of logarithmic value of AE cumulative event count to unit inelastic axial strain, the damege levels of concrete specimens were evaluated and the following results were obtained.
(1) The m values have good correlation with the ultimate strength of concrete specimens and this relationship between them is approximately linear.
(2) The m values of concrete specimens damaged by the freezing and thawing action or repeated load are linearly correlated with various deterioration levels.
The AE method was applied to the early identification of alkali-aggregate reaction, and the following results were concluded.
(1) The maximum values of AE event rate in mortar specimens including reactive aggregate arise in 10 days and their values are extremely large in comparison with tghe ones composed of non-reactive aggregate.
(2) The increase of specimen length are linearly correlated with AE coumulative event count. In addition to the above, the accuracy of three-dimensional AE source location was improved.

  • Research Products

    (44 results)

All Other

All Publications (44 results)

  • [Publications] 近藤 克己: 土木学会第41回年次学術講演概要集. I. 125-126 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 新関 茂: Progress of Acoustic Emission III. 546-553 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 西間木 朗: 土木学会第41回年次学術講演会概要集. I. 487-488 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 藤田昌宏: 土木学会東北支部技術研究発表会講演概要. 119-120 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 兼森 寛明: 土木学会東北支部技術研究発表会講演概要. 378-379 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 近藤克己: 土木学会東北支部技術研究発表会講演概要. 382-383 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 近藤 克己: 土木学会第42回年次学術講演会概要集. I. 264-265 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 谷口 哲也: 土木学会第42回年次学術講演会概要集. I. 262-263 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 谷口 哲地: 土木学会東北支部技術研究発表会講演概要. 420-421 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊藤禎郎: 土木学会東北支部技術研究発表会講演概要. 422-423 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐々木義治: 土木学会東北支部技術研究発表会講演概要. 458-459 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山ノ内 正司: 土木学会第41回年次学術講演会概要集. V. 127-128 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐藤 世一: 土木学会東北支部技術研究発表会講演概要. 424-425 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部 則元: 土木学会東北支部技術研究発表会講演概要. 426-427 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山ノ内正司: 第6回アコーステック・エミッション総合コンファレンス論文集. 43-77 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田野 久貴: 土木学会第41回年次学術講演会概要集. 5. 109-110 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺英彦: 土木学会第41回年次学術講演会概要集. 5. 111-112 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺英彦: 土木学会東北支部技術研究発表会講演概要. 380-381 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 三浦 直之: 土木学会東北支部技術研究発表会講演概要. 384-385 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺英彦: 土木学会第42回年次学術講演会概要集. 5. 442-443 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小泉 清: 土木学会東北支部技術研究発表会講演概要. 460-461 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺英彦: 土木学会東北支部技術研究発表会講演概要. 488-489 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Katsumi Kondo: "On accuracy of three-dimensional AE source location" Proc. of 41st annual national comference of JSCE. v. 125-126 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akira Nishimaki: "Analys-s of microfracturing mechanism in concrete through Analys-s of microfracturing mechanism in concrete through three-dimensional AE source location" Proc. of 41st annual national conference of JSCE. i. 487-488 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shigeru Niiseki: "Fundamental research for evaluating applied stress levels in concrete structures through AE esting" Progress in acoustic emission III. 546-553 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masahiro Fujita: "Discremination of damaged places through three-dimensional AE source location" Proc. of annual conference of JSCE in Tohoku branch. 119-120 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroaki Kanemori: "Influence of loading velocity on Kaiser effect in concrete" Proc. of annual conference of JSCE in Tohoku branch. 378-379 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Katsumi Kondo: "Research on microfracturing mechanism in vicinity of aggregate through AE source location" Proc. of annual conference of JSCE in Tohoku branch. 382-383 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Katsumi Kondo: "Analyses of microfracturing mechanism in vicinity of aggregate through three-dimensional AE source location" Proc. of 42nd annual national conference of JSCE. I. 264-265 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tetsuya Taniguchi: "Analyses of microfracturing mechanism in vicinity of aggregate in model concrete" Proc. of 42nd annual national conference of JSCE. I. 262-263 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshinori Ito: "Influence of hereditary stress velocity on Kaiser effect in concrete" Proc. of annual conference of JSCE in Tohoku branch. 422-423 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tetsuya Taniguchi: "Research on frecturing behavior of mortar through AE wave form analysis" Proc. of annual conference of JSCE in Tohoku branch. 420-421 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshiharu Sasaki: "Analysis of Lkali-aggregate reaction through AE Testing" Proc. annual conference of JSCE of JSCE in Tohoku branch. 458-459 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masaji Yamanouchi: "AE property in concrete and its application" Proc. 41st annual national conference of JSCE. 127-128 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Selichi Sato: "Mechanism of AE geheration im freezing and thawing process of concrete" Proc. annual conference of JSCE in Tohoku branch. 424-425 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Norimoto Abe: "Evaluation of damaged levels in frozen and thawed concrete through AE testing" Proc. annual conference of JSCE in Wtohoku branch. 426-427 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masaji Yamanouchi: "Evaluation of damaged levels in concrete through AE tgesting" Proc. 6th national conference on acoustic emission. 43-47 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hisataka Tano: "Fundamental research for evaluating hereditary stress in reinforced concrete through Kaiser effect" Proc. of annual national conference of JSCE. v. (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hidehiko Watanabe: "Experimentg and consideration for AE property in reloading process in splitting test of concrete" Proc. of 41st annual conference of JSCE. v. 111-112 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hidehiko Watanabe: "Influence of Keepling period of concrete specimen on Kaiser effect" Proc. annual conference of JSCE in Tohoku branch. 380-381 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Naoyuki Miura: "Influence of sea water on AE property of concrete" Proc. annual conference of JSCE in Wtohoku branch. 384-385 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hidehiko Watanabe: "Fundamental experiment for application of AE testing to alkali-aggregate reaction" Proc. 42nd annual national conference of JSCE. v. 442-443 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kiyoshi Koizumi: "AE property in alkali-aggregate reaction" Proc. of annual conference of JSFcE in Tohoku branch. 460-461 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hidehiko Watanabe: "Experiment and consideration for evaluating heredity in alternately loaded beam" Proc. of annual conference of JSCE in Tohoku branch. 488-489 (1988)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1989-03-30  

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